.net faq's

What is three tier architecture?

3-Tier architecture generally contains UI or Presentation Layer, Business Access Layer (BAL) or Business Logic Layer and Data Access Layer (DAL).

Presentation Layer (UI)
Presentation layer contains pages like .aspx or windows form where data is presented to the user or input is taken from the user.

Business Access Layer (BAL) or Business Logic Layer
BAL contains business logic, validations or calculations related with the data, if needed. I will call it Business Access Layer in my demo.

Data Access Layer (DAL)
DAL contains methods that helps business layer to connect the data and perform required action, might be returning data or manipulating data (insert, update, delete etc). For this demo application, I have taken a very simple example. I am assuming that I have to play with record of persons (FirstName, LastName, Age) and I will refer only these data through out this article.

What changes are done in IIS 6.0 over IIS 5.0?

IIS makes easy to get information. IIS 6.0 is the next latest of web server available in Windows Server 2003 platform. IIS 6.0 contains several enhancements over IIS 5.0 that are mainly to increase reliability, manageability, scalability, and security. IIS 6.0 is a key component of the Windows Server 2003 application platform, using which you can develop and deploy high performance ASP.NET Web applications, and XML Web Services.